
DMM CheckPlus
A friend recently purchased a DMMCheck Plus and let me take it home for some testing. This device provides a known DC voltage, AC voltage, four resistances, four capacitances, four inductances, and two frequencies that you can compare your instruments against. This was a great chance to check the accuracy of my DMMs, 2 of which I acquired second-hand. When is it useful? It outputs a single voltage and single current measurement. It will not test all the ranges of your multimeter. ...